CN109011912A

CN109011912A - Coalescing filter

Info

Publication number: CN109011912A
Application number: CN201810597170.0A
Authority: CN
Inventors: K·格里斯; J·乌特斯
Original assignee: Atlas Copco Airpower NV
Current assignee: Atlas Copco Airpower NV
Priority date: 2017-06-12
Filing date: 2018-06-12
Publication date: 2018-12-18
Anticipated expiration: 2038-06-12
Also published as: EP3638399A1; US11596888B2; CA3061589A1; PH12019550286A1; ES2897222T3; US20200188829A1; EP3638399B1; KR20200016374A; BE1025322A1; BR112019026083A2; RU2019143634A3; WO2018229639A1; MX2019014979A; CN208990394U; CN109011912B; RU2019143634A; BE1025322B1; SI3638399T1; AU2018284136A1

Abstract

The present invention relates to a kind of component including filter stick and bottom cover, bottom cover is arranged on the following side of filter stick, wherein filter stick includes filter medium, filter medium includes coalescing medium and discharge medium along the flow direction of gas, at least one outlet opening is arranged in bottom cover for the liquid from discharge medium drainage of coalesced at position corresponding with discharge medium, the side away from filter medium of bottom cover is provided with dripping position and at least one discharge profile, dripping position is located relative at the position for the central part that at least one outlet opening is displaced to bottom cover, at least one discharge profile extends to dripping position from least one outlet opening, discharge profile is provided for the dispersed phase of coalescence being excreted to dripping position from least one outlet opening, the dispersed phase of coalescence is drained along dripping position.By means of the invention it is possible to improve the discharge of dispersed phase and prevent the formation of wet-tape.

Description

Coalescing filter

Technical field

The present invention relates to a kind of component including filter stick and bottom cover, and the present invention relates to a kind of filters and a kind of bottom Portion's lid, more particularly it relates to a kind of coalescing filter.

Background technique

It the use of coalescing filter is many from the mixture coalesced dispersed phase of two kinds of immiscible phases (continuous phase and dispersed phase) Well known.The example of practical application includes the aerosol droplets from the compressed air separation oil from air compressor and crankshaft (oil aerosol drop) will be separated as the water of dispersed phase from the fuel as continuous phase in fuel-water system, or It is separated in oily water-oil systems from water as continuous phase as dispersed phase.

The coalescence of dispersed phase is induced by coalescing medium, and the coalescing medium generally includes the one or more porous fibres of multilayer Wiki matter, the porous fibrous matrix can be the (oleophylic or hydrophilic or compatible with dispersed phase or adsorbent) or non-of wetting (oleophobic or hydrophobic or with dispersed phase repel) of wetting.The fibre substrate of coalescing medium and pore system present in it have Induce the surface of accumulation or the coalescence of dispersed phase.When using coalescing filter, the dispersing fluid of the drop containing dispersed phase with The continuous phase or carrier of fluid, which move together, passes through coalescing medium.One actual example is by transmitting the air of oily pollution The air is purified by coalescing filter.Dispersed phase usually coalesces in the first layer on the fiber of coalescing medium.With The lasting supply of dispersing fluid, lesser drop will become biggish drop.Drop is transmitted through entire filtering by air-flow Device, and when drop reaches so that drop is no longer able to the size on the fiber for adhering to coalescing medium, the drop is logical Often filter is left via discharge medium (drainage medium) under the influence of gravity.

Coalescing filter can be existing to have with various types of materials, the material be, for example, organic and inorganic fiber or Porous material.These materials can use in a variety of manners, for example, uniformly, it is heterogeneous, layering or folding or beat Material that is pleat or rolling, agglomerated material, layered product (laminates) and combinations thereof.

Be suitable as coalescing filter is typically in the form of that film, fabric, cylindric, prismatic or other are simple or complicated Geometry.The separating capacity of filtering material depends on various parameters, and the parameter includes fiber in filter or coalescing medium Composition and orientation, the yield of filtering material under physical condition, the concentration of dispersed phase (pollutant), filtering in carrier or continuous phase The volume for the continuous phase that the pressure and filter that material is born are exposed at any time.

In the coalescing filter vertically positioned, filter medium (i.e. coalescing medium and discharge medium) generally remains in top For collecting the oil being discharged from discharge medium between end cover and lower case or lower end lid.It usually will by adhesive Lower end lid and/or upper end lid are attached on coalescing medium and/or discharge medium.

After a period of time, coalescing filter generally reaches stable state, wherein the product of the dispersed phase drop in coalescing medium Poly- rate corresponds to the dispersed phase of coalescence from the rate of discharge of filter.The drop of coalescence usually has 5 to 1000 μm of drop Diameter.However, for this filter, problem appear to is that the oil of coalescence is too slow from medium excretion is discharged or is discharged, and The low portion of discharge medium becomes by oil saturated.Air from coalescing medium is forced to flow by the way that medium is discharged, described The low portion of discharge medium is near bottom cover by oil saturated.This is not only resulted in by flowing a part by discharge medium Purification air reuptake oil, and also result in oil droplet and burst on the outer surface of discharge medium, this cleaning in filter Oily particle is formed on the effluent of side, then the oily particle is then cleaned air and carries together.

WO93/10881 describes a kind of cylinder filter, and the cylinder filter is used to purify by the aerosol of oil Contaminated with oil mist air stream.It interferes and if the low portion that WO93/10881 describes discharge medium is not affected by axis Upwards lower than coalescing layer No Tooting Area in, then can greatly reduce coalescing layer and be discharged medium bottom at oily saturated zone or Overlapping between so-called " wetting zones ".Other than other factors, the interference that medium is discharged can be drawn due to pressure change Rise, but can also due to discharge medium Local Contraction and design (such as the lower edge of discharge system of medium is discharged Recess or groove) and cause.For example, the compression that the low portion of medium is discharged may occur when material is mounted in filter, Or makes oil along side by the low portion of blocking discharge medium rather than be discharged along the bottom end of discharge medium.Row The obstruction of the lower end of medium also can result in the increase of wetting zones out because oil can only via side rather than pass through discharge The bottom of layer flows away.

Filter described in WO93/10881 includes MV coalescence material layer and macropore discharge material layer, and the micropore is poly- Knot material layer is used to absorb the liquid of coalescence from coalescence material for coalescing mist of oil present in air, the macropore discharge material layer The liquid of body and the low portion for being excreted to filter, coalescence is discharged in droplets from the low portion.Filtering The bottom of device is closed by end cover, and coalescing medium is glued in the end cover.End cover and filter layer are tightly connected, and seal Close the low portion of filter.It is transferred to from filter in order to reduce oil and flows through the air of filter, under discharge layer has Portion part, the low portion and coalescing medium are arranged spaced a distancely and by the convex of another non-permeable material Edge is played to separate with coalescing medium.

However, being that layer is discharged to be compressed near end cover described in WO93/10881 the shortcomings that filter.This resistance Effective discharge is stopped, and it can be several millimeters to several centimetres high so-called wet-tape that capillarity, which produces,.Discharge The compression of layer helps to form oily saturated zone in the bottom of discharge layer.Accordingly, there exist the oil being located in the region to be passed through The risk carried secretly again by the purified air stream of discharge leafing opened filter.

WO2016/181820 describes a kind of end cover, and the side towards filtering material of the end cover includes center Protrusion, the central protrusion extend to the inner space of filter stick and are located in the inner space, and for filtering of demarcating The central space that material is positioned around.In addition, end cover includes periphery wall, the periphery wall has external rings and inner loop, The external rings and inner loop are connected to each other by means of multiple connectors radially extended.Discharge is provided between connector to open Mouthful.End cover described in WO2016/181820 does not include dripping position, and also not for oil is mobile from outlet opening To the means of dripping position, therefore the discharge of oil from discharge medium is insufficient and too slow.

US2017/144128 describes a kind of prefilter for fuel tank, and the prefilter includes having center The first end lid of opening.Along end cover circumference be arranged liquid flow path, the one of the bottom of the liquid flow path Part is step-like and a part of is ring-shaped.The fluid of coalescence can pass through stepped passageway portions and circular passage portion / gap flow through end cover.However, US2017/144128 does not describe how to provide dripping position and for inciting somebody to action Oil is excreted to the means of dripping position from outlet opening, so that the discharge of oil from discharge medium is insufficient and too slow.

Summary of the invention

Therefore, it is contemplated by the invention that providing a kind of filter, the filter is in discharge medium (such as oily zone of saturation) The risk for forming dispersed phase zone of saturation further decreases.

According to the present invention, this is realized by showing the filter of the feature of the characteristic of the first claim.

For this purpose, the present invention relates to a kind of component including filter stick and bottom cover, the filter stick for separate compressed gas and The dispersed phase being contained therein, the bottom cover are arranged on the following side of the filter stick, wherein the filter stick includes that filtering is situated between Matter, the filter medium include coalescing medium and discharge medium along the flow direction of the gas, and the coalescing medium is for gathering Dispersed phase is tied, the discharge medium is used to the dispersed phase of coalescence being discharged to bottom cover in a downward direction to be used to be discharged coalescence Dispersed phase, wherein at least one outlet opening be arranged in bottom cover at position corresponding with the discharge medium with In the liquid from the discharge medium drainage of coalesced.Component according to the present invention is characterized in that deviating from for the bottom cover is described The side of filter medium is provided with dripping position and at least one discharge profile, the dripping position be located relative to it is described at least At the position for the central part that one outlet opening is displaced to the bottom cover, it is described at least one discharge profile from it is described at least One outlet opening extends to the dripping position, wherein the discharge profile is provided for the dispersed phase that will be coalesced from institute It states at least one outlet opening and is excreted to dripping position, the dispersed phase of the coalescence is drained along the dripping position.

According to the present invention, discharge profile include positioned at bottom cover on the side of filter medium and relative to described Side it is recessed extend or relative to the side it is recessed and extend any profile, but regardless of its shape how.According to this hair Bright, discharge profile also refers to any profile extended along the direction of dripping position from least one outlet opening

The inventors have discovered that the dispersed phase that the presence of at least one discharge profile promotes coalescence is arranged from least one Opening arrives the discharge (for example, excretion of the liquid of coalescence) of dripping position out, at least one described discharge profile is connected at least One outlet opening and from least one described outlet opening extend.In addition, discharge profile ensures the dispersed phase of coalescence Discharge is guided in a desired direction along the side away from filter medium of bottom cover, in particular along the direction of dripping position It is guided from outlet opening.Excretion more orient, may improving and may accelerating of the dispersed phase of coalescence from outlet opening There is stimulation by the discharge of discharge layer for the dispersed phase of coalescence, and in other words, the dispersed phase for allowing to coalesce is more Discharge medium is flowed through well, and therefore facilitates to improve discharge.Due to improved discharge, prevent to be formed it is so-called " wet-tape ", the wet-tape are the dispersed phases (such as liquid) that coalesce as shown in Figure 2 in the band at the bottom of discharge medium Accumulation.The wet-tape generally axially extends to the height that the purification gas from coalescing medium flows through discharge layer.Due to The formation of wet-tape is prevented from, can flow through filter purification gas reuptake coalescence dispersed phase risk most Smallization.

The presence of at least one discharge profile further provides the advantage that the dispersed phase coalesced leaves filter Direction is controlled, so that the excretion of the dispersed phase of coalescence more oriented and more effective at dripping position gather, become can Energy.The discharge of orientation also have it is following a little: reduce bottom cover along the side of fluid drainage and the pollution of peripheral part, And improve the discharge with the dispersed phase for usually accelerating coalescence.

In the first preferred embodiment of the present invention, at least one the discharge side away from filter medium of profile from bottom cover Portion's protrusion or the recessed side.In the latter case, discharge profile will generally use the form of discharge groove.Previous In the case of kind, discharge profile can for example take the form of the one ridge on the side of filter medium of bottom cover.

In a further advantageous embodiment, one or more outlet openings are set along the neighboring of bottom cover.It is more excellent Selection of land, at least one outlet opening extend at least part in the circumferential direction along the circumference of bottom cover to facilitate It is effectively drained from discharge medium, and there are multiple this outlet openings.

At least one discharge profile can think suitable various shape and/or size using by expert, and it can be with Extend in all directions.In a preferred embodiment, at least one discharge profile extend to from the outlet opening (or In other words along the direction of the dripping position) dripping position is extended to, or only in the dripping position and the discharge Extend in a part of the distance between opening.In a preferred embodiment, at least one discharge profile is along the direction of dripping position Extend from the terminal position of outlet opening or from the combination of the position at center for being displaced to outlet opening or both.When use has Along bottom circumference major part extend opening or gap bottom cover when, this is especially suitable for along the entire of opening The liquid of length effectively drainage of coalesced.In another preferred embodiment of the invention, at least one discharge profile is applied In vertical edge, the vertical edge extends in a downward direction from the side away from filter stick of the bottom cover, it is described extremely A few discharge profile is located at the side towards at least one outlet opening of the vertical edge.

In order to allow that medium is discharged relative to the desired positioning of at least one outlet opening in bottom cover and to the greatest extent may be used Most effective excretion is realized on energy ground, and the side towards discharge medium of bottom cover preferably includes clamp device, the fastening dress Set the side towards discharge medium at least part that the lower edge of medium is discharged to be located in bottom cover.Example Such as, these clamp devices can be the mechanical fastening device being arranged on the side towards discharge medium of bottom cover, the machine Tool clamp device is, for example, the hook or other protrusions for being attached to bottom cover, and the discharge medium can be for example by the hook or protrusion It hooks or can otherwise be mechanically fixed against, the other modes include one or more discontinuous isolated intervals The lug opened and upright dual edge, the lug extend to discharge medium from bottom cover with the separation for medium will to be discharged Part is maintained between lug and the neighboring of bottom cover, and the dual edge is prolonged on the direction of discharge medium from bottom cover It stretches, the discharge medium is maintained between the dual edge, and wherein dual edge is preferably so that medium is discharged not to be pressed from both sides by dual edge Firmly.It is obvious that expert, which can be used, thinks any other suitable mechanical fasteners mode.

In another preferred embodiment, the lower edge of medium is discharged for example by welding (such as supersonic welding Connect), fusion, the side towards discharge medium for being attached to using adhesive or glue bottom cover.Within the scope of the invention, it glues Mixture refers to on-mechanical adhesive.Various adhesives, such as glue or resin etc. can be used in the present invention, in conjunction with weldering can be passed through (soldering) or fusion discharge medium and the material of bottom cover are connect to realize.Expert can determine adhesive appropriate, simultaneously The with due regard to material that discharge medium and bottom cover are presented respectively.When adhesive is used, it is discharged between medium and bottom cover Connect the tie point spaced apart that is preferably by draining off in the lower edge of medium or the vertical sides by the way that medium is discharged The connection of low portion is established so that the low portion edge of the discharge medium liquid that stays open, and coalesce substantially to The excretion of opening is still possible.

Detailed description of the invention

The present invention is explained further by using the description of attached drawing and these attached drawings.

Fig. 1 shows the view of the inside of coalescing filter, and the coalescing filter is present in gas phase commonly used in coalescence In dispersion liquid phase.

Fig. 2 shows the filter medium with coalescing medium and discharge medium, the filter medium has oil at bottom Zone of saturation.

Fig. 3 a-3d shows the view of the side towards filter medium of bottom cover, wherein the side has circumferentially The outlet opening of application.

Fig. 4 a-4d shows the view of the side away from filter medium of bottom cover, wherein the side has the bottom of along The outlet opening and discharge groove that the circumference of portion's lid applies, and the discharge groove from outlet opening along the direction of dripping position Extend.

Fig. 5 shows the view of the side away from filter medium of bottom cover, and the filter medium is equipped with discharge The upright discharge edge of groove.

Fig. 6 shows four kinds of possible modes, and wherein flow of the compressed gas can pass through coalescing filter in this way.

Fig. 7 a and Fig. 7 b respectively illustrate the plan view and view of the following side equipped with positioning aid of bottom cover.

Fig. 8 a and 8b show the view for being provided with the bottom cover of collecting zone of dispersed phase or liquid for collecting coalescence Figure.

Specific embodiment

Coalescing filter 10 shown in FIG. 1 includes closed shell 24, and the shell 24 has filter 12 at top.Filter First 12 have entrance 16, and compressed gas is fed into coalescing filter along the entrance 16, there is dispersion in the compressed gas Phase (such as aerosol of liquid).In the following description, liquid aersol will always be known as gas (example as continuous phase Such as air) in dispersed phase example.It is wherein also suitable in the presence of other compressed gas of other dispersed phases however, this is not damaged In the fact of the invention.

Shell 24 includes outlet 18, and the outlet 18 after gas has flowed through filter stick for draining the pressure of purification Contracting gas.Filter bowl 35 can be detachably attached to filter 12 and be formed together shell 24, so that the inside of coalescing filter Space can be approached for replacing filter stick 36 if necessary.Dismountable connection can think suitable any side with expert Formula is established to establish, such as by means of threaded connection, bayonet connection, fixture etc..Filter stick 36 is preferably able to from 12 He of filter It is detachable on filter bowl 35, allow to regularly replace or replace if necessary filter stick 36.

In the context of the present invention, filter stick refers to the unit of filtering material, and the filter stick is maintained in bottom cover, excellent Selection of land is maintained between upper cap and bottom cover, and also comprises at least one coalescing medium and discharge medium.Filter stick may be used also To further comprise one or more barrier layers, to hinder the reflux of the opposite coalescing medium of dispersion of coalescence.

Coalescing filter shown in FIG. 1, which is intended for coalescing, to be present in the gaseous carrier of gas (such as compressed gas) One or more liquid dispersed phases.One or more dispersed phases can be pollutant such as inertia or reactive materials.One A or multiple dispersed phases can for example belong to two or more in such as liquid, aerosol, big drop or these materials The group of mixture.Dispersed phase is usually the pollutant to remove from gas phase.It is suitble to make together with coalescing filter of the invention The example of fluid is compressed gas, such as by the compressed gas of the Aerosol Pollution of oil or water as dispersed phase.

Filter stick includes filter medium, and the filter medium includes at least one layer of MV coalescence medium.Coalescence is suitable as to be situated between The material of matter is known to expert and including poromerics, and the material is preferably to have average diameter in 2 μm and 100 μm Between hole porous material.Depending on expected application, especially if imagining the coalescence of multiple pollutant, peace can choose Two or more different coalescing mediums are filled, every kind of coalescing medium has desired compatibility for pollutant to be removed. Coalescing medium can be made of single layer or two or more layers, these layers can be made of identical or different material.Suitably Layered material includes the substrate or material being made of the fiber with finite length, continuous filaments and combinations thereof.Main coalescing medium Following material is preferably included, the material tolerance is in order to promote displacement of fluid by main coalescing medium pressure applied, support Liquid pollutant present in resist fluids and tolerance manufacture, assembling and the static state being exposed to using material when filter and Dynamic stress.The example of suitable lamellar fibre material includes textile fiber material or non-woven fiber material, knitted fabric, braiding The combination of object, felt and material or layered product or its compound.

Filter medium is used to maximize including at least one layer of macropore discharge medium 30 near coalescing medium 22 and downstream Locate the liquid of coalescence from the excretion of filter medium.Discharge medium 30 is preferably arranged to the surface of neighbouring coalescing medium 22, is arranging Out presence or absence of air layer or other physical separation layers between medium and coalescing medium.Preferably, medium and coalescence is discharged The basic major part that medium is positioned to its surface is adjacent, so that there is no air layer between discharge medium and coalescing medium, thus Allow gas and/or the dispersed phase of coalescence from coalescing medium to the energy efficient flowing of discharge layer.Coalescing medium and discharge are situated between Matter for example can with and be preferably concentrically arranged.

Discharge usually occurs under the influence of gravitation, it is also possible to being forced to occur.

When from the circumferencial direction of filter stick, discharge medium can be contacted with coalescing medium over the whole length.However, Discharge medium will be contacted preferably with coalescing medium along the circumferencial direction of bottom cover over the entire length, and the length is situated between in discharge The height of matter is between the 15% and 85% of the circumference of bottom cover.Contact between two media will be by outlet opening near Be located at bottom cover on positioning aid and interrupted substantially.Contact between two media will be primarily present in outlet opening Between position at, and contact will be substantially not present at the height of outlet opening.For the height of filter stick, medium is discharged It can be contacted in the entire height of the filter stick with coalescing medium.Contact between two media will mainly pass through outlet opening The neighbouring positioning aid in bottom cover that is located at is interrupted.

Expert is familiar with being suitable as the material of discharge medium.The example of suitable discharge material is textile material or nonwoven material Material, knitted fabric, felt, open celled polymeric foam, textile web (spun web), open net (open nets) and previous materials Combination or laminate or compound.Material for medium to be discharged can be for example selected from thermoplasticity or thermosetting plastics, You Jihuo The group of inorganic substances, metal material or alloy, the mixture of above-mentioned material and its chemically modified form.Medium is discharged for manufacturing Suitable material include foam of polymers, such as it is polyurethane foam, polyethylene, polypropylene foam, polyvinyl chloride foam, poly- Styrenic foams, polycarbonate foam, polyimide foam.However, polyurethane foam is preferably used, because it has well Thermal stress resistance performance and as prevent coalescence liquid back to coalescing medium barrier layer ability.Discharge is suitable as to be situated between The other materials of matter include so-called interval insulant, and the interval insulant is on the flow direction of compressed gas comprising at least the The material of one wall.Interval insulant is also preferably included at least one barrier layer of the adjacent partition layer of downstream setting.? In context of the invention, " barrier layer " refers to following material sheet or material layer, to the dirt of coalescence compared with wall Dye object there is lower permeability and can absorb this should not via the coalescence that wall is drained pollutant and will be described The pollutant of coalescence is discharged along discharge direction.Barrier layer is intended in particular for the dispersed phase for minimizing and coalescing, and the purification flowed is empty Gas is carried secretly and will leave the risk of filter again.According to the present invention, " wall " refers in discharge direction for coalescence Dispersed phase have high discharge ability material layer.Wall has porous open design preferably in discharge direction, This facilitates the effectively pollutant from coalescing filter (especially from discharge layer) discharge or removal coalescence.

Wall can be made of the sheet material of single material layer, but wall also may include that two or more are identical Or different material layer.Wall can be made of the sheet material of single material layer, but wall also may include two or more Multiple identical or different material layers.

In another preferred embodiment, wall includes three-dimensional spacer fabric, three-dimensional knitted fabric (knitted Fabric the combination of two or more) or in these materials, the wherein opposite cover of space fabric or three-dimensional knitted fabric It is connected by spacer, at least part of the spacer extends through coalescence filtration along the flow direction of compressed gas Device is to realize alap flow resistance.

If desired, filter medium can also include protection in upstream (while also in downstream of main coalescing medium 22) Layer 25.The protective layer 25 is also used as discharge layer.The example of suitable material as protective layer is that opening (open) is spun Polypropylene layer is knitted, but other textile materials or non-woven material also can be used.Filter element preferably further includes core 20.At least one The downstream of filter core 20 is arranged in a main coalescing medium 22.

The shell 24 of coalescing filter 10 can also include the floating discharger 32 with the bottom of enclosed filters Output mechanism.Suitable output mechanism may include automatic, semi-automatic or hand-operated valve, retain the dispersed phase of coalescence in the housing It is discharged along the output mechanism.

Component of the invention includes bottom cover 33 in bottom.Component of the invention preferably further includes positioned at the top at top End cover.Make it possible to be positioned and retained in filter stick and filter medium between upper end lid and bottom portion lid in this way.

Bottom cover 33 can a variety of materials known to expert be made, such as metal (such as stainless steel) or plastics.Plastics Usually preferably as simple design is possible, and plastics are connected to the material of discharge medium 30 will be discharged Medium, which is located in bottom cover 33, has large-scale possibility.

The connection of discharge medium 30 and bottom cover 33 ensures to ensure that along the entire edge of discharge medium 30 and bottom cover Good contact, thus promote discharge.Expert becomes known for that the various devices that medium 30 is connected to bottom cover 33 will be discharged.

In the first preferred embodiment, attachment device is mechanical connecting device.As illustrated in figs. 7 a and 7b, the court of bottom cover 33 It can be equipped with multiple separation, spaced apart mechanical connecting devices 29,39 to the side 34 of discharge medium 30, for keeping The bottom margin of medium is discharged.As a result, it is no longer necessary to for example by by coalescing medium 22 and discharge medium 30 be bonded together come Connect coalescing medium 22 and discharge medium 30.It provides the advantage that connection interference or interferes the risk of coalescence and discharge Can be reduced to it is minimum, and be discharged medium can also be entirely used for discharge coalescence dispersed phase, discharge medium low portion (i.e. close to the part of bottom cover 33, discharge plays a major role here) can also be used for the dispersed phase of discharge coalescence.In this field In coalescing filter known to technical staff, discharge medium is usually glued or is welded in coalescing medium and/or bottom cover.It is this Compound has adverse effect discharge ability and speed, and reduces the amount for the discharge medium that can be used for being discharged.The present invention In it is larger portion of discharge medium availability make it possible to further decrease it is for example deposited or accumulate in discharge medium in Coalescence oil be transferred to flowing the air through filter stick in risk.

For including by the suitable examples that mechanical fastening device or mechanical device that medium is maintained in bottom cover 33 is discharged Pin, hook, lug or any other form protruding portion, discharge medium can be attached to the protruding portion.For the ease of correct attached It connects, is preferably set up at least three hook or pin etc..In another embodiment, the lower edge that medium 30 is discharged uses adhesive (especially glue, resin etc.) is attached to bottom by welding or fusion.The connection also preferably as separation, be spaced apart Position or point are to apply, so that discharge medium is stayed open and can be discharged in lower edge.It preferably will bonding Agent is applied to the surface of discharge medium contacted with bottom cover (especially discharge medium is shelved on the edge in bottom cover).

In a preferred embodiment, the side 34 towards discharge medium of bottom cover 33 includes positioning aid, described Positioning aid is used at least part that the lower edge of medium 30 is discharged being located in the direction discharge medium of bottom cover 33 Side 34 on.These positioning aids can take expert known and be thought suitable any form by it.Positioning aid The vertical edge 29 that can be arranged for example including the edge along bottom cover 33.Vertical edge 29 be preferably configured so that and At least one outlet opening 5-8 is preferably applied to the first side 9 that bottom cover makes vertical edge 29 along outlet opening 5-8 Extend.What the vertical edge 29 can be continuously or interrupt, it is preferred that continuous edge.Use is set in vertical edge 29 Cooperate in corresponding second protruding portion, second protruding portion is preferably along outlet opening 5-8 and outlet opening The second vertical edge 39 that the second opposite side 19 of first side 9 extends.First vertical edge 29 and the second vertical edge 39 The distance between be preferably selected such that its it is sufficiently large with include discharge medium 30 and keep discharge medium 30.Second is prominent Portion 39 can take any form that expert is deemed appropriate out, and can be preferred that continuous vertical edge or preferably It is interrupted in one or more positions (at the height of the position preferably between two adjacent outlet opening 5-8) upright Edge, or may include the one, two or more protruding portion at outlet opening.Due to depositing for positioning aid , the invention allows to use filter medium, wherein coalescing medium and discharge medium be disposed adjacent to each other, without passing through Adhesive connection, so that bigger active material filtering surface keeps available.

As shown in figure 3, bottom cover 33 includes bottom 44, at the bottom i.e. in the side backwards to filter medium of bottom cover At least one outlet opening 5,6,7,8 is arranged at the position for the lower edge for corresponding to discharge medium in portion 44.Although one Outlet opening may be sufficient, but bottom cover preferably includes multiple outlet openings 5,6,7,8.Outlet opening preferably edge The neighboring 54 of bottom cover 33 is arranged with being separated from each other, and extends through the thickness of the material of bottom cover, so that liquid It can flow and can be discharged from discharge material by bottom cover from the internal capacity of filter.As shown in Figure 3d, opening can To extend along the circumferencial direction of bottom cover 33 and extend along a part of the circumference of bottom cover.It is seen in the circumference of bottom cover When examining, outlet opening can have greater or lesser length.

At least one of opening 5,6,7,8 in bottom cover be connected to discharge profile (drainage profile) 1,2, 3,4,13,14, the discharge profile is moved along the direction of dripping position 15 from least one outlet opening 5,6,7,8, and by Discharge for promoting the dispersed phase or liquid of coalescence is set.

At least one outlet opening 5,6,7,8 can have expert and think suitable any shape, especially rule or not The geometry of rule.As illustrated in figs. 3 a-3d, at least one opening can be substantially circular or oval, triangle, side Shape, elongated shape or expert think any other suitable shape.In embodiment shown in Fig. 3 d, circle of the outlet opening in bottom cover Major part extension in circumferential direction circumferentially is preferably as it allows effective liquid to be discharged.Opening 5,6,7,8 Size is not crucial for the present invention, and can be in wide model under conditions of opening does not extend to below coalescing medium Enclose interior variation.For this purpose, opening generally remains in predetermined range in the size in the radial direction of bottom cover.In transverse direction On direction, the size that profile is discharged is preferably selected such that they support as much as possible and promote droplet formation and drop to arrange Out.Discharge profile preferably corresponds to discharge medium in the radial direction side of filter medium in the width in the radial direction of bottom cover 33 Upward thickness, with ensure by bottom cover support discharge medium bottom margin and outlet opening between it is best be overlapped and it is true Protect effective discharge.In order to ensure sufficiently large overlapping with the lower edge of discharge medium, outlet opening usually has bottom Lid total circumferential length, the length the height of outlet opening be in the circumference of bottom cover 15% to 85% between change.

Expert can choose the quantity of outlet opening, while with due regard to their size and the expected velocity of discharge and effect Rate.Usually there are at least two outlet openings.The distance between continuous opening on the circumferencial direction of the following side 34 of bottom cover It is not crucial for the present invention, and can changes in a wide range, but will be usually chosen to the liquid of coalescence The best discharge of body is possibly realized.

As shown in Fig. 4 c and 4d, the first end 21 and the second end 31 of at least one outlet opening are connected respectively to first Profile 1 and the second discharge profile 2 is discharged.As shown in fig. 4 a, discharge profile 13 not necessarily only leads at least one outlet opening End, but can also extend from the position at the center for being displaced at least one outlet opening.

In the first embodiment shown in Fig. 4 a-4d, discharge profile 1,2,13 is applied in bottom cover 33 (especially the bottom of at Portion's lid 53 deviates from the side 34 of discharge medium).At least one described discharge profile is situated between relative to bottom cover away from filtering The side of matter forms profile, it means that the discharge profile in bottom cover, which can be, immerses oneself in (countersunk), and for example Take the form of groove.Discharge profile further relates to the fact, i.e., discharge profile can be prominent relative to bottom cover, and example The form of rib or one ridge can such as be taken.But partially immerse oneself in part it is outstanding discharge profile combination be also can Can.

Profile 1,2,13 is discharged preferably to extend from least one outlet opening 5-8 along the direction of dripping position 15, discharge Coalescence liquid or dispersed phase be discharged along the direction of dripping position 15.Dripping position 15 is preferably in bottom cover away from row Immediate vicinity on the side of medium out.But it is also possible to provide dripping position in different positions.

For example, discharge profile can substantially along linear extension, and can for example from outlet opening primarily radially Extend to dripping position (as illustrated in fig. 4 c), however, discharge profile can also mainly curved (1,2), and from least one Dripping position at a center for extending to bottom cover that is open.Continuous discharge profile can be concentrically disposed with as shown in Figure 4 b, It is arranged away from one another as shown in Fig. 4 d and Fig. 4 a.At least one passing away is arranged to however, expert will be preferably chosen So that distance as short as possible must bridge between the opening and discharge unit in bottom.

In the second embodiment of bottom cover shown in figs. 5 a and 5 b, at least one discharge profile 3,4 rows of being used in Out in edge 14, it is described discharge edge 14 be located at bottom cover away from be discharged medium side 53 on.Edge 14 is discharged can phase It is prominent for the side 53 of bottom cover.As shown in figure 5 a and 5b, discharge edge 14 can predominantly axially prolong relative to filter stick Stretch, it is also possible to be discharge the tapered extension in edge 14, that is, converge to the center of filter stick and/or bottom cover.This is last One example is not shown.When using be discharged edge when, at least one discharge profile 3,4 be arranged in discharge edge 14 towards row Out on the side of opening 8, with the dispersed phase for the coalescence from discharge medium to be discharged.These discharge profiles 3,4 are on discharge side Extend on edge, and preferably axially extends also relative to the axis of filter stick.However, can also make these that 8 edge of profile be discharged Different directions extends, such as angled relative to axial direction.At least one is arranged however, expert will be preferably chosen Profile is arranged so that distance as short as possible must be bridged between outlet opening and discharge unit (drain) out.

At least one discharge profile 1,2,3,4 can be relative to bottom cover away from the side of filter medium protrusion or recessed Enter.At least one discharge profile 1,2,3,4 can take the form for example relative to bottom cover discharge rib outstanding.At least One discharge profile 1,2,3,4 can take the form that groove is discharged for example recessed relative to bottom cover.At least one discharge What profile can be continuously or interrupt, it is preferred that continuously to ensure effectively to be excreted to dripping position 15.

It is not crucial for the present invention that size of the profile 1,2,3,4 on the circumferencial direction of bottom cover, which is discharged,.? In the radial direction, discharge profile usually will extend to dripping position from outlet opening, but profile is discharged can also be shorter and only Extend in a part of the distance.

Discharge profile 1,2,3,4 can be provided with coating on its partial-length or whole length, to reduce coefficient of friction And promote the discharge of the liquid of coalescence.Coating can such as hydrophobic property or oleophobic property.The side towards filter stick of bottom Oleophobic coating or hydrophobic coating can be set, for promoting the liquid of coalescence along the side for the outlet opening being present in bottom To excretion.

The surface of at least one discharge profile 1,2,3,4 and the side for being provided at least one discharge profile of bottom cover can To be smooth or textured.The surface of at least one discharge profile and bottom cover are provided at least one discharge as a result, The side of profile can have identical or different surface texture.For example, surface can be it is undulatory or groove-like, or With sharp protrusion.Surface texture can take certain geometrical pattern either random.

Bottom cover 33 has the shape being aligned with geometry set by filter stick, and usual bottom will be mainly circular, Although any other shape is all possible.However, bottom cover 33 can be mainly flat, to promote the liquid of coalescence along row The discharge of profile out, bottom are preferably in extend conically along the centre of bottom cover 33 or center or the direction of center portion, Wherein dripping position 15 is located at intermediate or center or center portion and coalesces oily along the centre or center or central portion The direction divided is discharged from bottom cover.This for example shows in Fig. 4 a-4d.

In the description being given above, outlet opening is located near the circumferential edges of bottom cover, and the dispersed phase coalesced The dripping position at the center of bottom cover is fed into from the edge of bottom cover.However, also can be in the center position along bottom cover Outlet opening is set at the position of displacement, and the setting discharge profile on the position at edge for being more displaced to bottom cover, The discharge profile allows edge to be discharged to one or more dripping positions along the direction at the edge of bottom cover.

As shown in Figure 8, if it is desired, container or cupule 50 has can be set in bottom cover 33, for collecting discharge The liquid of coalescence is simultaneously excreted to discharge circuit.This facilitates dispersed phase and purified gas point even betterly From.

Component of the invention have an advantage in that oil discharge can be promoted (promote) at make be discharged medium Absorption can be limited to minimum limit.Band due to improved discharge, at the bottom of discharge medium 43 as shown in Figure 2 The formation of so-called " wet-tape " (this is the accumulation of the dispersed phase or liquid of the coalescence in coalescing medium 22) is prevented in 42. The wet-tape generally axially extends to the height that the purification gas from coalescing medium flows through discharge layer.

Fig. 7 shows another preferred embodiment of filter of the invention, and wherein positioning aid 17,29 is located in bottom On the side towards discharge medium in portion, for positioning coalescing medium and discharge medium.Positioning device preferably includes setting Center in bottom and the protrusion towards filter stick 17.Protrusion 17 preferably has conical by its shape, and is arranged for enclosing Coalescing medium is positioned around cone.This cone is suitable for for example being used together with columnar coalescing medium with discharge medium, Middle cone is contained in inner space.Positioning aid further includes first edge 39, and the first edge 39 is along outlet opening At least part extends on the circumferencial direction of bottom cover 33, and is located at the circumferential edges away from bottom cover of outlet opening 8 On 29 side 23.Therefore first edge 39 limits the thickness of coalescing medium, and be conducive to coalescing medium in 17 He of cone Arrangement between first edge 39.The interrupted edges that first edge 39 will be usually partially formed, various pieces are spaced each other Certain distance it is arranged, and extends on the circumferencial direction of bottom cover 33 along at least part of outlet opening 8.Preferably, Each marginal portion extends along the whole length of corresponding opening 8.

Positioning aid further preferably further includes the upright periphery edge extended along the circumferencial direction of bottom cover 33 29, the periphery edge 29 is located between periphery edge 29 and first edge 39 for medium will to be discharged.These positioning auxiliaries The lower edge that part ensures to be discharged medium is arranged in above outlet opening 5-8, and coalescing medium is located at not wearing for bottom cover 33 The top of bore portion, between cone 17 and edge 39.Since there are first edge, energy between coalescing medium and discharge medium Enough prevent coalescing medium from there is the dispersed phase of coalescence with contact of the medium in the low portion of filter medium, the contact is discharged Or the risk that oil gathers in discharge medium.

As described above, the present invention relates to a kind of component including filter stick and bottom cover, the filter stick is for separating compressed gas Body and the dispersed phase being contained therein, the bottom cover are arranged on the following side of filter stick.

The invention further relates to a part as filter as described above or as one of component as described above The bottom cover divided.

The invention further relates to a kind of filter of filter stick including receiving in the housing, the shell further includes being located at bottom The pots of the liquid for collecting coalescence of lid lower section.This filter is suitable as the separator-filter in compressor, example Such as oil separation filter device.This filter is commonly subjected to high mechanical load, because they are directly arranged at compressor rear, comes from The air of compressor contains a considerable amount of oil.Air flowing in this filter usually carries out as described relative to figs. 6c and 6d.

Claims

1. a kind of component including filter stick and bottom cover, the filter stick is for separate compressed gas and the dispersion being contained therein Phase, the bottom cover are arranged on the following side of the filter stick, wherein the filter stick includes filter medium, the filter medium edge It include coalescing medium and discharge medium when the flow direction observation of the gas, the coalescing medium is used for coalesced dispersed phase, institute Discharge medium is stated to be used to the dispersed phase of coalescence being discharged to bottom cover in a downward direction to be used for the dispersed phase of drainage of coalesced, In at least one outlet opening be arranged in bottom cover at position corresponding with the discharge medium for from the row The liquid of medium drainage of coalesced out, which is characterized in that the side away from the filter medium of the bottom cover is provided with drippage Position and at least one discharge profile, the dripping position are located relative at least one described outlet opening and are displaced to the bottom At the position of the central part of portion's lid, at least one described discharge profile extends to the drop from least one described outlet opening Dropping place is set, and the discharge profile is provided for the dispersed phase of coalescence being excreted to drippage from least one described outlet opening The dispersed phase of position, the coalescence is drained along the dripping position.

2. component according to claim 1, wherein at least one described discharge profile is from the bottom cover away from described In the side protrusion of filter medium or the recessed side.

3. component according to claim 1 or 2, wherein the discharge profile is discharge groove.

4. component according to any one of the preceding claims, wherein be provided with along the circumferential edges of the bottom cover One or more outlet openings.

5. component according to any one of the preceding claims, wherein at least one described outlet opening is along the bottom At least part of the circumference of lid extends on the circumferencial direction of the bottom cover.

6. component according to any one of the preceding claims, wherein at least one described discharge profile is applied in directly In stile edge, the vertical edge extends in a downward direction from the side away from institute's filter stick of the bottom cover, it is described at least One discharge profile is located at the side towards at least one outlet opening of the vertical edge.

7. component according to claim 6, wherein the vertical edge is along at least one outlet opening towards institute The side for stating dripping position extends on the circumferencial direction of the bottom cover.

8. component according to any one of claim 1 to 5, wherein at least one described discharge profile is along the drippage The direction of position extends from the terminal position of the outlet opening or from the position shifted towards the center of the outlet opening.

9. component according to any one of the preceding claims, wherein the dripping position is located in the bottom cover In center portion point.

10. component according to any one of the preceding claims, wherein the bottom cover is mainly circular shape.

11. according to claim 1 to component described in any one of 5 or 8 to 10, wherein it is described at least one discharge profile from At least one described outlet opening is radially.

12. according to claim 1 to component described in any one of 5 or 8 to 11, wherein at least one described discharge profile One or more it is mainly curved.

13. component according to any one of the preceding claims, wherein the bottom cover towards the discharge medium Side includes positioning aid, and the positioning aid is used to position at least part of the lower edge of the discharge medium On the side towards the discharge medium of the bottom cover.

14. component according to any one of the preceding claims, wherein the lower edge of the discharge medium passes through weldering It connects, fuse, bonding or the glued side towards discharge medium for being fastened to bottom cover.

15. component according to any one of the preceding claims, wherein the lower edge for being fastened on the discharge medium It is continuous on edge, or on the part spaced apart of the separation in the lower edge of the discharge medium.

16. component according to claim 14 or 15, wherein the 5-85% of the bottom margin of the discharge medium, Preferably 10-80%, more preferably 15-75% are secured to the bottom cover.

17. component according to any one of the preceding claims, wherein at least one described discharge profile is coated with oleophobic Coating or hydrophobic coating are to reduce friction.

18. component according to any one of the preceding claims, wherein at least one described discharge profile and the bottom The side for being provided at least one discharge profile of lid has identical or different surface texture.

19. component according to any one of the preceding claims, wherein the filter medium includes coalescing medium, and The coalescing medium and the discharge medium are disposed concentrically upon, and in the circumference of the coalescing medium and the discharge medium It is disposed adjacently, and is physically contacted at least part.

20. component according to any one of the preceding claims, wherein the coalescing medium and the discharge medium are along institute The circumferencial direction of filter medium is stated in the 15-85%, preferably 20-80%, more preferably 25- of the circumference of the filter medium It is disposed adjacently on 75%.

21. a kind of filter, the filter includes filter stick according to any one of the preceding claims, and the filter stick holds It receives in the housing, wherein the shell further includes being located in pots below the bottom cover for collecting via the drop Dropping place sets the liquid of the coalescence of discharge.

22. filter according to claim 21, wherein positioning aid be arranged in the bottom cover towards the row Out on the side of medium for the coalescing medium and the discharge medium to be positioned relative to the bottom cover.

23. a kind of as a part of the filter according to claim 21 or 22 or as according to claim 1 to 20 Any one of described in component a part bottom cover, the bottom cover includes at least one outlet opening, described at least one A outlet opening is used to drain the liquid coalesced in the filter medium of coalescing filter from discharge medium, wherein the bottom cover The side away from the filter medium be provided with dripping position and at least one discharge profile, it is described at least one discharge profile The dripping position is extended to from least one described outlet opening, the discharge profile is provided for the dispersion that will be coalesced Mutually dripping position is excreted to from least one described outlet opening.